Carbureter.



W. OTTAWAY.

GARBURETER.

APPLICATION FILED MAY 10. 1907.

Patented Jan. 19, 1909.

2 SHEETS-SHEET 1.

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W. OTTAWAY.

OARBURETER.

APPLICATION FILED MAY 10. 1907.

Patented Jan. 19, 1909.

2 SHEETS-SHEET 2.

UNITED srarns arena a nines.

WILLIAM OTTAWAY, OF AURORA, ILLINOIS, ASSIGNOR TO AURORA AUTOMATIGMAOHINERY COMPANY, OF AURORA, ILLINOIS, A CORPORATION OF ILLINOIS.

CARBURETER.

Specification of Letters Patent.

Patented Jan. 19, 1909.

To all whom it may concern:

Be it known that I, l/VILLIAM OTTAWAY, a citizen of the United States, and a resident of Aurora, in the county of Kane and State of Illinois, have invented certain new and useful Improvements inCarbureters; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

This invention relates to improvements in carbureters such as are employed in connection with internal combustion motors, and more especially to means for regulating or controlling the supply of the liquid hydrocarbon to the space or chamber of the apparatus in. which the liquid is volatilized and the explosive mixture is produced.

The invention consists in the matters hereinafter described and set forth in the ap pended claims.

In the accompanying drawings which form part of this specification,l igure l is a view in side elevation of a carlmreterembodying my invention. Fig. 2 is a view in central, vertical section thereof, taken on line 22 of Fig. 3. Fig. 3 is a view in central vertical section thereof, taken on line 33 of Fig. 2. Fig. I is a sectional view looking upwardly, taken on line -l4 of Fig. 3. Fig. 5 is a plan section, taken on line 55 of Fig: 3.

As shown in said drawings, 1 indicates the outer cylindric wall and 2 the inner cylindric wall of an annular chamber or reservoir for the liquid hydro-carbon. The said inner Wall 2 consists of an upright tube or cylinder arranged centrally within the outer wall 1,

which latter is provided with an inwardly extending annular tlange 3. which forms the bottom wall of the reservoir and to which the bottom of the cylinder 2 is connected by a screw-joint. The top of the cylinder 2 extends above the top of the reservoir, which latter is provided with an annulartop wall or cover a. The cylinder 2 opens at its bottom into a horizontally disposed air chamber 5 which is located below the reservoir and which has at one side a flaring mouthpiece 6 forming the air inlet opening of the carburetor and the upper and lower walls of which are made of concave form at their edges to fit the outer surface of the power cylinder of the motor, to which the carbureter is usually attached. Such air inlet openingformed by the mouth piece is located closely adjacent to the wall of the motor cylinder so that the air drawn into the carburcter may be heated by contact .with said cylinder: Gent-rally of the lower part of the cylinder 2 is located a hollow upright postor feed tube 7 which is supported at its lower end from the bottomwall 3 of the reservoir by means of radial arms 8 (Fig.

The outer cylindric wall 1 and the bottom wall 3 of the reservoir, together with the feed tube 7 and its supporting arms 8, are preferably cast in one piece or integral with each other.

The interior of the feed tube 7 is connected at its lower part by means of a radial pas sage 9, passing through one of the arms 8, with a discharge opening in the bottom of the reservoir.

A strainer 52 of wire 'auze or the like, is shown as applied over the said discharge opening, in order to prevent the passage of dirt or grit from the reservoir to the carbureting device. Said passage 9, with the feed tube, forms a conduit by which the liquid is conducted from the reservoir to exit openings at the top of said feed tube where the liquid is discharged and vaporized. Said feed tube 7 is shown as extended at its lower end downwardly through the bottom wall of the air chamber 5 and as provided at its lower end with a screw-plug 10 which closes the bottom of the said feed tube and may be removed for cleaning the interior thereof. The feed tube 7 is provided at its upper end with a screw-plug 11 having a conical head which fits a conical seat in the upper end of said feed tube. In the outer face of said conical head are provided a plurality of small grooves forming passage 12 through which the liquid is discharged. Said plug 11 is shown. as'having screw-threaded engagemcnt at its lower part with the interior of the post and as provided with a bore or passage extending upwardly from its lower end. and communicating by radial holes with an annular space formed between the upper part of the plug and the surrou'nding feed tube. The details of construction in the upper part of the feed tube 7 and plug 11, above referred to, are not in themselves novel. having been heretofore employed in carburetors.

At one side of the reservoir is located a "of said plug may have a transverse notch sleeve thereon.

vertical tube 13 which opens at its upper end into the reservoir and depends from the bot- 5 tom wall thereof. Vith the lower end of said tube 13 is connected, by a screw-threaded connection, a coupling member lathe lower end of which is centrally apertured and adapted for attachment of a supply pipe through which the liquid is supplied to the carbureter. Within said tube 13 is located a hollow or tubular plug 15 having near its lower end an internal, upwardly facing, conical valve seat. Said plug 15has screwthreaded engagement with the interior of the tube 13 and is thereby made adjustable vertically in said tube. On the lower end of said plug 15, below the. tube 13, is located a nut or screw-collar 16, in the form of a sleeve, having a conical upper end adapted to enter a conical seat formed in the lower end of the tube 13. Said screw-collar is provided with flat faces for the application of a wrench and constitutes a jam-nut which, when screwed upwardly on the plug into contact with the lower end of the said tube 13, serves to hold or lock the plug from turning in the tube. Said plug 15 may be turned to effect its vertical adjustment by a suitable-implement applied to its lower end when the coupling member 14 is removed and the screw-collar 16 loosened. As, for instance, the lower end for a screw-driver, as illustrated. The tubular coupling member 14 is made of sufiicient size or diameter at its upper part to re ceive the lower end of said plug and the The inlet opening at the bottom of the coupling member is shown as provided with a wiresereen 17 of fine mesh to constitute a strainer to prevent the passage from the suply pipe to the reservoir of particles of dirt or the like.

Within the screw-plug 15 is located a valve stem 18 having a conical lower end which forms with the valve seat within the plug 15 a valve by which the admission of liquid to the reservoir is controlled. The valve stem 18 is flattened at its sides or fluted longitudinally to permit the passage of liquid between the same and the surrounding wall of the plug. The vertical adjustment of the said screw-plug 15, enables'the valve seat therein to be accurately adjusted relatively to the conical. lower end of said valve stem 18.

Within the annular reservoir is located a hollow, cylindric float 19 having vertical movement therein. In the lower part of the reservoir is located a lever 20 which is pivotally connected by means of a horizontal pivot pin 22 with a bracket 21 which is attached to and rises from the bottom wall of the reservoir. Said lever 20 isprovided with two curved arms 23, 23 that extend at opposite sides of the cylinder 2 and are pivotally connected by means of transverse horizontal pivots 24, 24, (Fig. 5), with depending arms or brackets 25 on the bottom of the float 19. At a point outside of the pivot 22, the said arms 23, 23 of the lever 20 are secured to a.

single horizontal .arm .26, the outer end of which is connected with the upper end of the valve stem 18 by means of a horizontally arranged, longitudinal slot in the end of said arm 26, which is engaged by a pivot pin 27 passing through the forked upper end of the said valve stem. v

The bracket 21 is. provided with a horizontal base-plate which is secured to the bottom wall of the reservoir by means of a screw inserted through said bottom wall, as clearly seen in Fig. 3. Said bracket 21 consists of two arms formed on or bent upwardly from the base-plate, which are c011- nected by a horizontal tube 2.8, through which the pivot 22 passes; the ends of said pivot being secured in the parts of the arm 23, 23 which are located at opposite sides of the said bracket. The bracket 21 thus formed by the base-plate, the two upright arms thereon and the tube 28 connecting said arms, affords a laterally extended bearing for the pivot 22, of considerable length, adapted to hold the lever 20 from tipping or tilting sidewise, and forming a pivotalsupport for the lever of durable character. Each of the brackets 25, 25 011 the float also consists of a baseplate which is attached to the float and has two depending parallel arms laterally separatedfrom each other and connected by a'horizontal tube 29 (Fi 2). The pivot pin 24: passes through said tu e 29 and is secured at its ends in parts of the arm 23, which latter is bent at its ends into U- form so as to extend at the inner side of The outer wall 1 of the reservoir is provided, above the tube 13, with a lateral chamber 30 which communicates with the body of the reservoir by a slot in the cylindric outer wall of the latter and is adapted to receive the upper end of the valve stem 18 and the adjacent end of the lever 20. Said chamber 30 is extended upwardly, in the form of a semi-cylindric wall 31, to a point *near the top of the reservoir, the said side wall of which is provided with a slot between the side edges of the wall 31, so that the latter aflords a vertical groove or channel extending upwardly from the inlet passage outside of the float 19. The chamber 30.is provided with. an opening opposite the end of the lever 20, which opening is closed by a screw-plug 32, by the removal ofwhich access may be had to the joint betweenthe upper end of the valve stem and said lever. Q

The normal level of the liquid in the reservoir is approximately at the discharge passages of the feed tube 7. The float 19 is so arranged that when the liquid in the reservoir falls below the normal level, the weight of the float, acting on the lever 20, lifts the valve stem 18 and opens the admission valve for the entrance of an additional supply of liquid. As soon as the level of the liquid reaches the desired height, the upward pull of the float on the lever 20 etfects the closing of the valve through the downward movement of the valve stem 18.

By adjusting the plug 15 vertically, the position of the valve seat is altered relatively to the valve stem 18, or the movable member of the valve, and the parts may be thereby adjusted to provide for the closing of the valve when the liquid in the reservoir rises to a desired level. The level of the liquid in the reservoir may, therefore, be controlled or regulated to give the best results in operation.

Located in the top wall 4 of the reservoir is a vertically sliding pin 33, the lower end of which rests on one end of a leaf-spring 31, (Fig. at) which is attached at its opposite end to said top wall and holds the pin normally elevated. By pressing down on the upper end of said pin, the lower end thereof will force downwardly the free end of the spring 34-, which, by acting on the top of the float, will depress the latter. The float and connected parts may thus be moved to ascertain if they be in working condition, or for admitting an additional supply of liquid to the reservoir when desired for starting the motor or at other times.

indicates a valve casing which is attached to the top of the reservoir preferably by connection with the end of the inner tube 2 which projects above the top wall 4t of said reservoir. The upper part of said valve casing has the form of ahorizontally arranged cylinder, while its lower part consists of an upright cylindric part or neck which surrounds and has screw-threaded engagement with the upper end of the cylinder 2. Attached to the said valve casing 35 and projecting downwardly therefrom, concentrically within the cylinder 2, is a cylindric tube 36. The lower end of said tube 36 surrounds the upper end of the feed tube 7; thereby forming an annular space or passage between the lower end of said tube 36 and the top of the said feed tube, through which air is drawn upwardly from the interior of the cylinder 2 into the tube 36, which latter forms the vaporizing or mixing space or chamber of the carbureter. vaporization of the hydro-carbon discharged from the passages 12, 12 at the top of the feed tube takes place by reason of the air being drawn up wardly through said annular space around the top of the feed tube and past the discharge openings 12, 12 thereof. Said tube 36 is provided, at a point below the discharge passages 12, with an inwardly projecting annular rib 69 preferably formed by depressing the metal of the said tube from the exterior thereof. Such annular rib serves to throw or deflect the air which rises between the tube 36 and feed tube 7 inwardly against the upper part of the said feed tube at which the openings of said discharge passages are located, with the etfect of producing better or more rapid vaporization of the liquid hydrocarbon as it issues from said discharge passages.

At one side of the valve casing 35 the latter is provided With a laterally extending pipe 37 which isconnected with the inlet port of the motor cylinder and communicates with the interior of the valve casing.

Within the valve casing is a horizontally arranged, cylindric valve member 38 having ports which cooperate with ports in the valve casing to control the quantity of the explosive mixture drawn from the earbureter to the motor cylinder and also to control or regulate the admission of an auxiliary air supply for varying the proportions of air and vapor in the mixture. The said valve member 38 has turning or rotative movement in the casing for the purpose of controlling the passage of the mixture from the valve casing to the pipe 37 and for varying the auxiliary air supply to correspond with the quantity of the mixture delivered to the motor, and said valve member also has endwise adjustable movement in the said casing for the purpose of varying the auxiliary air supply to give a greater or less proportion of vaporin the mixture. The said valve casing and-the rotative and endwise adjustable valve member therein, constitute partst-of a controlling valve which is describedand claimed in a separate application, Serial Number 336,685, filed by me in the United States Patent Otflce on the 29th day ofSeptember 1906. The construction and operation of said controlling valve need not, therefore, be herein described in detail but so far as illustrated in the accompanying drawings embraces features as follows: The ports in the valve casing are formed in a cylindric bushing 39 held in place in the upper or cylindric part of said casing by means of a screw-stud 40 (Fig.

2) which also forms a stop to limit the movement of the valve member 38 by its engagement with a slot 51 in the valve member. The said valve member 38 is closed at one end by a head 41 provided with a rigidly attachedoperating arm 42. At its opposite end the valve member 38 is closed by a disk or head 43, provided with a central, outwardly extending stem 44.

The valve bushing 39 is provided with four ports or openings, to wit,a circular port 45 communicating with the interior of the I tube 36, as clearly seen in Fig. 2, a port 46,

preferably of rectangular form, which communicates with the exit pipe 37, as clearly seen in Figs. 2 and 3, and two ports 47 and 48 arranged in endwise alinement with the port 45 and which communicate with the upper end of the annular space between the cylinder 2 and the tube 36, as clearly seen in Fig. 2. The cylindric valve member 38 is provided with two ports 49 and 50. The port 49 cooperates with the port 46, and the port 50 coiiperates with the air supply port 48.

The ports in the valve member 38 are so shaped and so arranged that the turning of the valve varies the effective opening of the port 46, and thereby regulates the quantity of explosive mixture passing to the motor and at the same time opens or closes to a corresponding extent the auxiliary air supply ports 47 and 48, so that the same proportions of vapor and air are maintained in the mixture in all positions to which the valve may be turned, Endwise adjustment of the valve member operates to give greater or less auxiliary air supply through said ports 47 and 48, to vary the proportions of air and vapor in the mixture, and the ports are so arranged that such proportions will remain unchanged in all positions to which the valve member may be turned for the purpose of controlling the'supply of explosive mixture to the motor as fully set forth in said separate application.

For effecting endwise adjustment of the valve member 38, the end of the valve casing 35 adjacent to the head 43 is provided with a neck or cylindric extension 53 which is externally screw-threaded to receive a screwthreadcd cap 54. \Vithin the neck 53 and cap 54 is located a (-ylindric sleeve which surrounds the stem 44 on said head 43, and within which said stem is adapted to freely turn when the valve member 38 is turned in the valve casing. Said sleeve is connected with the cap 54 so as to rotate and move endwise therewith and is held from endwise movement relatively to the stem by a connection affording free rotative movement of the sleeve relatively to said stem. The said sleeve 55, at its inner end, slides in a central opening in the casing head and has an outwardly extending annular flange which, by its contact with an annular seat on the easing head, limits the outward endwise movement of said sleeve. Said sleeve 55 is also provided at its outer end withan outwardly extending annular flange. The outer end of the stem 44 projects beyond the outer end of the sleeve 55 and is provided with an annular groove 56 which is adapted to be engaged by a plate or disk 57, The cap is attached to the sleeve by means of screws 58, 58 inserted through the said cap and passing through notches formed in the opposite sides of the disk 57 and into the flange at the outer end of said sleeve. Between the reduced central part of the sleeve 55 and the parts of the neck 53 and cap 54 surrounding the same, is located an expansively acting coiled spring 59 that is held in compression between the inwardly facing shoulder on the sleeve formed by the flangeat the outer end thereof, and an outwardly facing shoulder formed within the neck 53.

Endwise movement of the valve member 38 is effected by the turning of the screwcap 54 on the screw-threaded neck 53, inward and outward movement of said cap being transmitted to the valve stem through the medium of the disk 57. The spring 59, exerting constant outward pressure on the cap, not, only serves to prevent the cap from turning with the valve member 38, but also from being accidentally turned or shifted by the jarring of the parts in the operation of the motor to which the carbureter is attached.

The plug 15, made vertically adjustable relatively to the valve stem 18, constitutes an important feature of my invention, because providing a means for determining or controlling the level of the liquid in the reservoir, and a construction which embraces an inlet valve, the movable member of which is connected with the float and the stationary member of which is adjustable relatively to the movable member is herein claimed, without limitation to the specific details of construction in the parts.

I claim as my invention 1. In a carbureter, the combination with a reservoir, a float therein, an upright depending tubular extension on one side of the reservoir, a tubular coupling member surrounding and having screw-threaded connection with the lower end of said extension. a plug located within and having screw-threaded connection with the sur i rounding wall of said tubular extension, said f()1'111((l to provide a longitudinal passage for the flow of liquid longitudinally between the valve stem and the plug, and a horizontally arranged lever within the reservoir pivoted betwcenlts ends and connected at one end with said float and at 1ts opposite end with said valve stem, said valve stem being connected with the said lever by a slotted connection aflording horizontal vmovement of said upper end of the valve stem relatively to the said lever.

2. In a carburetenthe combination with a reservoir, a float therein, an upright depending tubular extension on one side of the, reservoir, a tubular coupling member surrounding and having screw-threaded connection with the lower end of the said extension, a plug located within and having screwthreaded connection with the surrounding wall of said tubular extension, said plug extending below the lower end of said tubular extension and havin a central passage open at its upper end and seat in its lower end, a screw-threaded sleeve applied to the lower end of said plug and having at its upper end a conical surface bearing against a corresponding conical surface on the lower end of said tubular extension, a valve stem in saidv plug having a conical lower end fitting said valve seat and the upper end f wl1ich extends above the said provided with a valve plug and upwardly into the reservoir, and means within the reservoir connecting the said upper end of said valve stem with the said float.

3. In a carburetor, the combination of a reservoir, a float therein, a valve, a valve actuating lever, and a bracket for pivotally connecting said lever with one of said parts, embracing two laterally separated arms, a tube connecting the said arms with each other and a pivot pin inserted through said tube; said lever being provided in its part adjacent to'said bracket with two separated parts extending at opposite sides of the bracket and to which the ends of said pivot pin are attached.

In testimony, that I claim the foregoing as my invention I afiix' m signaturein the presence of two witnesses, this th day of April-AFD. 1907.

WILLIAM OTTAWAY.

Witnesses:

E. M. VVEs'r, Enw. GUSTAFSON. 

